linux 端口操做相关指令

1. 查看端口是否已开

firewall-cmd --query-port=80/tcp

2.查看防火墙状态

systemctl status firewalld

running 状态即防火墙已经开启

3.开启防火墙

systemctl start firewalld

1. 开启防火墙

service firewalld start

5.关闭防火墙

systemctl stop firewalld

-  上述方式可能没法开启，能够先
    systemctl unmask firewalld.service 
    而后 
    systemctl start firewalld.service

1. 开永久端口号

firewall-cmd --add-port=80/tcp --permanent

- 提示 success 表示成功

1. 从新载入配置

firewall-cmd --reload

8.移除端口

firewall-cmd --permanent --remove-port=8001/tcp